The Tor Browser: js/src/tests/ecma_5/Function/function-caller.js@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Any copyright is dedicated to the Public Domain.

     3  * http://creativecommons.org/licenses/publicdomain/

     4  */

     6 var gTestfile = 'function-caller.js';

     7 var BUGNUMBER = 514581;

     8 var summary = "Function.prototype.caller should throw a TypeError for " +

     9               "strict-mode functions";

    11 print(BUGNUMBER + ": " + summary);

    13 /**************

    14  * BEGIN TEST *

    15  **************/

    17 // behavior

    19 function expectTypeError(fun)

    20 {

    21   try

    22   {

    23     fun();

    24     throw new Error("didn't throw");

    25   }

    26   catch (e)

    27   {

    28     assertEq(e instanceof TypeError, true,

    29              "expected TypeError calling function" +

    30              ("name" in fun ? " " + fun.name : "") + ", instead got: " + e);

    31   }

    32 }

    34 function bar() { "use strict"; }

    35 expectTypeError(function barCaller() { bar.caller; });

    37 function baz() { "use strict"; return 17; }

    38 expectTypeError(function bazCaller() { baz.caller; });

    41 // accessor identity

    43 function strictMode() { "use strict"; return 42; }

    44 var canonicalTTE = Object.getOwnPropertyDescriptor(strictMode, "caller").get;

    46 var barCaller = Object.getOwnPropertyDescriptor(bar, "caller");

    47 assertEq("get" in barCaller, true);

    48 assertEq("set" in barCaller, true);

    49 assertEq(barCaller.get, canonicalTTE);

    50 assertEq(barCaller.set, canonicalTTE);

    52 var barArguments = Object.getOwnPropertyDescriptor(bar, "arguments");

    53 assertEq("get" in barArguments, true);

    54 assertEq("set" in barArguments, true);

    55 assertEq(barArguments.get, canonicalTTE);

    56 assertEq(barArguments.set, canonicalTTE);

    58 var bazCaller = Object.getOwnPropertyDescriptor(baz, "caller");

    59 assertEq("get" in bazCaller, true);

    60 assertEq("set" in bazCaller, true);

    61 assertEq(bazCaller.get, canonicalTTE);

    62 assertEq(bazCaller.set, canonicalTTE);

    64 var bazArguments = Object.getOwnPropertyDescriptor(baz, "arguments");

    65 assertEq("get" in bazArguments, true);

    66 assertEq("set" in bazArguments, true);

    67 assertEq(bazArguments.get, canonicalTTE);

    68 assertEq(bazArguments.set, canonicalTTE);

    71 // [[ThrowTypeError]] characteristics

    73 assertEq(Object.prototype.toString.call(canonicalTTE), "[object Function]");

    74 assertEq(Object.getPrototypeOf(canonicalTTE), Function.prototype);

    75 assertEq(canonicalTTE.length, 0);

    76 assertEq(Object.isExtensible(canonicalTTE), false);

    77 canonicalTTE.lumpy = 17;

    78 assertEq(canonicalTTE.hasOwnProperty("lumpy"), false);

    79 assertEq("lumpy" in canonicalTTE, false);

    80 expectTypeError(function setTTEProp() { "use strict"; canonicalTTE.x = 42; });

    82 /******************************************************************************/

    84 if (typeof reportCompare === "function")

    85   reportCompare(true, true);

    87 print("All tests passed!");

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